Lock socket



1932 w. F. HlLD 1,889,804

, LbCK SOCKET Filed April 27, 1929 ig. .1. F151. E.

WITNESSES INVENTOR fiv/J ,TgZZZL'am 1'? 172m 17M W ATTORNFYS Patented Dec. 6, 1932 i asa na WILLIAM F. HILD, OF EAST RUTHERFORD, NEW JERSEY LOCK S0 GKET Application filed April 27,

This invention relates to an improved lock socket for electric lamps, the object beingto provide an improved construction wherein the usual appearance is presented whlle means are provided which prevent the removal of a bulb or lamp by an ordinary turning movement.

Another object of the invention is to provide a lock socket for lamps, the construction 0 being capable of coacting with any of the standard sockets now on the market and when mounted functioning to readily receive a lamp but to prevent its unauthorized removal.

A further object, more specifically, is to provide a lock socket which is inexpensive and eflicient, .the structure being such that standard lamps may be readily used without change and may be readily applied or removed by the proper operation of the locking mechanism.

'In the accompanying drawing,

Figure 1 is a side view with certain parts shown in section illustrating an electrical socket or receptacle embodying the invention;

Figure 2 is a sectional view through Figure 1 on the line 2-2;

Figure 3 is a side view of an instrument which acts as a key for holding the parts in position while the lamp is being applied or removed. r V

In the accompanying drawing 1 indicates what may be termed a conventional socket, and 2 a standard lamp. The'device is shown in Figure 1 as applied to the socket 1, but if desired, it could be supplied to other forms of sockets or receptacles including those used alone or in connection with shades. As shown in Figure 1, a plate 3 is secured to theinsulating block 4 by suitable screws 5. This plate is cutaway to permit the projecting plug 4: or plug 4 to project through the plate so that the terminal 5' may-coact with the terminal on the lamp 2 in the usual manner. Plate 3 is provided with an annular turned over flange 6 which coacts with the flange 7 of the threaded socket shell 8. This shell at the outer end is preferably provided with notches 9, whereby the insulating blocks 10 and 11 held by the looped spring 12 may en- 1929. Serial No. 358,723.

gage and hold the shell 8 against rotation when lamp 2 is being screwed into place, or unscrewed. If the instrument shown in Fig.

3 is'not convenient, a piece of fibre or other article maybe. moved through the aperture 13 and pressed against the shell 8 to prevent its rotation while the lamp 2 is screwed into place or unscrewed. It will be understood that the socket 1 is of the usual construction, except for the parts just specified. When the lamp is screwed into position as shown in dotted lines in-Fig. 1, the screw tip 1% per manently connected with the lamp frictionally engages the shell 8 to such an extent that shell 8 will rotate with lamp 2, unless held positively against rotation. There is ample contact between flange 6 and flange 7 to permit a proper flow of current, while at the same time shell 8 is permitted to freely ro- 7o tate in either direction with the lamp unscrewing, unless shell 8 is held against r0 tation, as, above outlined. As illustrated in the drawing, two provisions have been made forholding the shell 8 against rotation while inserting or removing a bulb. It is evident, that changes maybe made in the particular way in which these looking or holding means may be used, as long as the shell 8 is per mitted to rotate when not held by some special means, and also as long as the parts are extremely simple and inexpensive. The way- 7 the shell 8 is mounted and the other parts associated therewith presents a structure,

which will protect lamps against unusual vibration. Also, the structure is particularly adapted for Christmas trees, or other ornamental lamps, but may be used wherever desired.

What I claim is In an electric socket, a threaded shell hav ing a peripheral flange at one end acting as means for mounting theshell in place,- and a toothed formation at the opposite end acting as means for receiving an instrument for preventing rotation of the shell while a lamp is being applied or removed, an apertured stationary plate having an inturned flange overlapping said peripheral flange for, holding said shell in place while permitting the same to rotate, and a resilient contact extending through said aperture plate for engaging the central contact of the lamp carried by said shell, said socket having an aperture for receiving an object which may be pressed against said shell for holding the same against rotation.

WILLIAM F. HILD. 

